Mining-machine.



n. F.. NOBLE.

mmm; MAcHlNE.

(Application filed May 13, 1901,)

Patented 0st. 2|, |902.

.3 sheets-sheet TH: cams Parzns oa. PHOTO-Luhe., wAsHmGroN,`u c

No. 7Il,643. Y Patented-Oct. 2l, |902.

, R. E. NOBLE.

MINING MACHINE. (Appxicaein med may 1s, 1901.)

3 Sheets-{Sheet 2.

(Nq Model.)

f@ sLmfNMx/ www N0.'7||,643. Patented out. 2|',4 |902.

n. E. NOBLE.

M|N|NG MACHINE.

(Application led May 13, 1901.)

s shgts-sheet 3.

(No Model.)

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' 'y UNITED STATES PATENT OFFICE. v

l RALPH E. NOBLE, OF CHICAGO, ILLINOIS.

MINING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 711,643, dated October21, 1902.

Applicants inea May 1s, 1901.

To all whom t may concern:

Be it known that I, RALPH E. NOBLE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Mining-lvlachines, ofwhich the following is a specification.

This invention relates more particularly to that class of machines usedfor undercutting coal or like material; and its general objects are toprovide a machine of this nature that will be simple in construction andeconomical and efficient in operation. l

Other objects are to provide a frame of peculiar and rigid constructionthe swinging. portion of which is sufficiently narrow to admit ofchanging grades or following irregular veins and face-walls; to providean automatic feeding device and cable-winding device; to .provide meansfor tightening the cutter-chain, and to provide means whereby thecutting apparatus is presented to the work at such an angle that themachine will not be crowded away from the work, thereby overcoming thethrust on the track and rendering a track unnecessary on regular orordinary bottoms.

It consists, then, in combining with a suitable carriage-frame-aswinging frame and means for swinging said frame, in combining with acarriage-frame a swinging `frame carrying the cutter-chain and providedwith means for tightening said chain, means for driving said chain andoperating said swinging frame,l and means for pulling the machine t0 itswork, and in such other features and details as will be more fullypointed out hereinafter and shown in the accompanying drawings, inwhich- Figure l is a general plan View showing the method of operatingthe machine. Fig. 2 is a plan view of a portion of the machine. Fig. 3is a sectional view of the same. Fig. 4 is a plan of the cutter-chainframe. Fig. 5 is a sectional view of the same.

A represents the carriage-frame of the machine, and it is provided `withrear brackets a. and front brackets a.' for bearing-wheels B, thetrunnions b of which are carried on adjustable dovetailed slides b',engaging with screws b2, secured in the frame-brackets. A circularbracket C, secured to the end of the frame A, has a bearing c for avertical shaft Serial No. 59,892; (No model.)

D, Fig. 3, and the swinging chain bearing frame E. The shaft D is drivenby a bevelgear F, secured thereto, as by a key d, which meshes with apinion g' on the shaftg of the motor G, mounted in the frame A.

Any suitable motor or driving means may y be used; but an electricmotor, as shown, is preferred. The frame A forms substantially adust-proof casing for the motor.

On the lower end of the shaft D is mounted a sprocket-wheel d', whichdrives the cutterchain E', carrying the forwardly-projecting cutters ee. An idler-wheel e', around which the chain is carried, is mounted in asuitable bearing e2, carried in guideways e3 in the end ofthe frame Eand may be forced forward to tighten the chainby means of the screw e",

mounted in the frame and engaging the slid able bearing-block and havingits shank eX- tending back to the end of the frame next the machine,where it is squared to engage a suitable wrench and may be readilyturned without withdrawing the frame from the work.

A particular feature of this invention is the means whereby thecutter-frame may be autov matically swung into any desired positionunder the coal, and more especially to one somewhat beyond ninetydegrees from its forward position in line-with the carriage. When it isin this position, as shown in dotted lines in Fig. l, the cutters willbe presented at such angle to the coal that instead of forcing thecarriage away from the face and against the track there will be notendency of a thrust of this kind, andthe machine will keep its normalposition, thus render bracing the track unnecessary, or in certaincasesthe track may be dispensed with and shoes or flatfaced wheels usedin place of the flanged wheels. This is accomplished by means of apinion H, mounted on a vertical shaft h, Fig.

8, which engages with gear-teeth c in the pe- IOO the gear-wheel F andis raised sufficiently to throw the ratchet by a projection f in itspath on the gear F. When the frame has been swung around to its desiredposition, the pawl is thrown out of action by raising the lever h6 outof engagement with the gear-wheel F, the disk M being cut away over theprojection f to allow such a movement.

In order to draw the machine forward against the work, a rope I isattached to some stationary object at some distance ahead and the endbrought around the drum J, which is then gradually turned and winds upthe rope, thereby drawing the machine forward. The drum is mounted onashaft j, secured in bearings in the brackets a. A double swinging arm K,pivoted on the shaft j, carries a pawl k, adapted to engage aratchet-wheel K on the same shaft. The arm is operated by a rod l,pivoted to a reciprocating rod l', mounted in bearings Z2 on the frameA. A pitman Z3 connects this rod by means of an adjustable crank-pinwith a disk M, mounted on the top of the shaft D and rotated thereby.

An alternative device for operating the drum consists of a Worm N,mounted on the shaft of the motor, which drives a worm-wheel m, mountedon a shaft n, carrying a disk n at the end thereof, which may beconnected, by means of a pitman n2, with the lever-arm K.

Having thus described my invention, which I do not limit to the exactconstruction or details shown, what I claim, and desire to secure byLetters Patent, is

l. In a device of the type set forth, a frame carrying a toothedcircular extension, a cutter-chain frame pivoted to said extension, ashaft carrying a gear engaging said toothed extension mounted in saidcutter-chain frame, ashaft mounted in the said extension and havingagear-wheel keyed thereto, with means for driving the gear-wheel, meansfor intermittently actuating said first-named shaft operated by saidlast-named gear-wheel, and means operated by the shaft in the extensionfor moving the entire machine.

2. In amining-machine, the combination of a frame, a motor mounted insaid frame, a toothed circular-shaped extension on said frame, acutter-chain frame pivoted to said extension, a shaft mounted in saidcutterchain frame, a gear on said shaft engaging the teeth on thecircular extension, a wormgear on said shaft engaginga worm on ashaftsupported in bearings from said frame, a

ratchet-wheel on said worm-shaft, a reversible ratchet-pawl, carried ina swinging arm from said shaft, a roller on said arm adapted to normallyrest on and be lifted by a cam on a gear-wheel mounted on a shaft insaid circular extension and driven by a gear on the motor, substantiallyas described.

3. A device of the type set forth, consisting of a frame carrying atoothed circular extension, a cutter-chain frame pivoted to theextension, ashaft mounted on the cutter-chain frame and carrying a gearmeshing With the teeth of the extension, a shaft journaled in theextension and having a gear keyed thereto, with means for operating thegear,a wormgear carried by the shaft of the cutter-frame, a second shaftsupported by the cutter-frame and carrying a worm meshing with thewormgear, and a gear-wheel carried by said lastnamed shaft, with meansfor operating the last-named shaft actuated by the gear-wheel of theextension, a disk carried by said shaft of the extension, a drumjournaled in the rear of the frame, a rope connected thereto and to astation ary point, and means connecting said disk and the drum, wherebythe latter is actuated by the disk.

4c. A device of the type set forth, comprising a frame carrying atoothed circular extension on its rear a shaft journaled therein andcarrying a gear-wheel, means carried by the frame for actuating saidgear-wheel, a cutter-chain frame pivoted to the extension, a shaft witha gear on its lower portion engaging the toothed extension,meansactuated by the said gear-wheel carried by the extension foractuating said shaft of the cutterchain frame, a disk in the shaft ofthe extension, a drum carried at the rear of the frame, a ratchet-Wheelconnected to the drum, a double swinging arm pivoted` to the shaft ofthe drum and carrying a pawl for engagement with the ratchet-wheel ofthe drum,an arm supported on the frame and connected to the doubleswinging arm, a pitmanlpivotally connected to said arm on the frame andto the said disk, a rope connected to the drum and to the stationarypoint, whereby they entire machine may be moved when the drum isoperated.

RALPH E. NOBLE.

lVitnesses:

ROBERT RYAN, LEVI D. KEIM.

IOO

